Possible Clues:

• Canny and sagacious
• Perceptive, shrewd
• Sharp enough to have you in a state
• Smart and canny
• Sharp taste rolled around centre of mouth
• Cute of you to get in such a state
• Clever and crafty
• Clever pupil finally drops English after getting good grades
• Sharp, like pupil dropping English finally
• Shrewd, canny